add branding and style blocks
extend base login template
Update browsable-api.md

Add login template docs
Merge pull request #794 from forgingdestiny/master

Add branding block to login template
Update release-notes.md
Added @forgingdestiny for login template work.

Thanks!  (Refs: #794)
Update docs on object-level permissions.

Closes #801.
Typo
Changed DepthTest to have depth=2
Changed definition of NestedModelSerializer to correct depth handling
Merge pull request #802 from chenjyw/master

Fix nesting issue with depth >=2
Added @chenjyw for depth bugfix #802.  Thanks!
Merge master